(19)
(11) EP 0 831 197 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.05.1999 Bulletin 1999/19

(43) Date of publication A2:
25.03.1998 Bulletin 1998/13

(21) Application number: 97119531.8

(22) Date of filing: 16.05.1988
(51) International Patent Classification (IPC)6: E05B 49/00
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 21.05.1987 US 52469

(62) Application number of the earlier application in accordance with Art. 76 EPC:
88304408.3 / 0292217

(71) Applicant: TRW INC.
Lyndhurst Ohio 44124 (US)

(72) Inventors:
  • Lambropoulos, George
    Grosse Pointe Woods, Michigan 48236 (US)
  • Hair, Robert A.
    Pontiac, Michigan 48054 (US)
  • Pitera, Kenneth R.
    Warren, Michigan 49093 (US)

(74) Representative: Maury, Richard Philip et al
Sommerville & Rushton, Business Link Building, 45 Grosvenor Road
St. Albans, Herts AL1 3AW
St. Albans, Herts AL1 3AW (GB)

   


(54) Remote control system for door locks


(57) A remote control system which includes (a) a receiver unit adapted to be fixedly mounted on a motor vehicle having at least one door lock with a first locked condition and a second unlocked condition and having means for receiving a coded signal including a code portion of binary bits, memory means for storing a first code of binary bits, means for comparing the code portion of a received coded signal with the first code and means for shifting the controlled device to one of the conditions upon the comparison match between the code portion of a received signal and the stored first code and (b) a transmitting unit for transmitting the stored second code of binary bits when the door lock is to be shifted into one of its conditions. In this system the invention involves the improvement wherein the coding of the second code set into the transmitter is a unique group of binary bits and the receiver unit includes a field programming arrangement for setting the first code of the receiver unit to the unique group of binary bits in the transmitting unit by using the signal from the transmitting unit as received by the receiver unit. In accordance with this improvement, the first code of the receiver unit is set to the second code of the transmitting unit in the field and may be changed from one code to another code upon authorized use of a second transmitting unit having its own unique code.






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